package common;

import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

/**
 * 读写文件的操作
 */
public class FileUtil {
    // 把 filePath 文件的内容读取出来并放到返回值中
    public static String readFile(String filePath) {
        StringBuilder result = new StringBuilder();
        try(FileReader fileReader = new FileReader(filePath)){
            while (true) {
                int ch = fileReader.read();
                if (ch == -1){
                    break;
                }
                result.append((char)ch);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return result.toString();
    }

    // 把 content 写入到 filePath 对应的文件中
    public static void writeFile(String filePath, String content) {
        try(FileWriter fileWriter = new FileWriter(filePath)){
            fileWriter.write(content);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}
